osist pren iso 27509:2019 - osist pren iso 27509:2019 · 2020. 4. 28. · iso/dis 27509:2019(e)...
TRANSCRIPT
SLOVENSKI STANDARD oSIST prEN ISO 275092019
01-september-2019
Industrija za predelavo nafte in zemeljskega plina - Kompaktni prirobnični konektorji s tesnilnim obročem IX (ISODIS 275092019)
Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISODIS 275092019)
Industries du peacutetrole et du gaz naturel - Raccordements agrave brides compactes avec bague deacutetancheacuteiteacute IX (ISODIS 275092019)
Ta slovenski standard je istoveten z prEN ISO 27509
2304060 Prirobnice oglavki in spojni elementi
Flanges couplings and joints
7518001 Oprema za industrijo nafte in zemeljskega plina na splošno
Equipment for petroleum and natural gas industries in general
ICS
oSIST prEN ISO 275092019 enfrde
2003-01Slovenski inštitut za standardizacijo Razmnoževanje celote ali delov tega standarda ni dovoljeno
oSIST prEN ISO 275092019
copy ISO 2019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ringIndustries du peacutetrole et du gaz naturel mdash Raccordements agrave brides compactes avec bague deacutetancheacuteiteacute IX
ICS 2304060
Reference numberISODIS 275092019(E)
DRAFT INTERNATIONAL STANDARDISODIS 27509
ISOTC 67SC 6 Secretariat AFNOR
Voting begins on Voting terminates on2019-06-14 2019-09-06
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL TECHNOLOGICAL COMMERCIAL AND USER PURPOSES DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT WITH THEIR COMMENTS NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION
This document is circulated as received from the committee secretariat
FAST TRACK PROCEDURE
ISOCEN PARALLEL PROCESSING
oSIST prEN ISO 275092019
ISODIS 275092019(E)
ii copy ISO 2019 ndash All rights reserved
COPYRIGHT PROTECTED DOCUMENT
copy ISO 2019All rights reserved Unless otherwise specified or required in the context of its implementation no part of this publication may be reproduced or utilized otherwise in any form or by any means electronic or mechanical including photocopying or posting on the internet or an intranet without prior written permission Permission can be requested from either ISO at the address below or ISOrsquos member body in the country of the requester
ISO copyright officeCP 401 bull Ch de Blandonnet 8CH-1214 Vernier GenevaPhone +41 22 749 01 11Fax +41 22 749 09 47Email copyrightisoorgWebsite wwwisoorg
Published in Switzerland
oSIST prEN ISO 275092019
Contents
Foreword vi
Introduction viii
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Abbreviations and symbols 3 41 Abbreviated terms 3 42 Symbols 3
5 Design 6 51 General 6 52 Design principles 6 53 Assembly requirements 8 54 Standard components 9 55 Units of measurements 9 56 Rounding 9 57 Compliance with piping design codes 9 58 Compliance to this document 10
6 Designation 10 61 Designation of flanges 10 62 Designation of seal rings 10
7 Materials 11 71 General 11 72 Flange materials 11 73 Bolting materials 11 74 Seal ring materials 12
8 Strength pressuretemperature ratings and leak tightness 13 81 General 13 82 Pressuretemperature ratings 14 83 Pressure testing and leak tightness 14
9 Dimensions of flanges 15 91 General 15 92 Weld neck (WN) dimensions 16 93 Blind flange (BL) dimensions 24 94 Integral flange (IF) dimensions 27 95 Rigid interface (RI) dimensions 39 96 Dimensions of paddle blanks (PB) and paddle spacers (PS) 42 97 Handle and lifting lugs 44 98 Dimensions of orifice spacers (OS) 46 99 Dimensions of reducing threaded flanges (RTs) 47 910 Auxiliary connections 48 911 Flange tolerances 49 912 Surface finish 50
10 Marking of flanges 51 101 Flanges other than integral flanges 51 102 Manufacturers name or trademark 51 103 Nominal size 52 104 Pressure class designation 52
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved iii
oSIST prEN ISO 275092019
105 Pipe dimensions 52 106 Material designation 52 107 Identification of internally threaded flanges 52 108 Material traceability 52 109 Marking examples 52 1010 Stamping 53
11 Dimensions of seal rings 53
12 Manufacture testing and inspection of IX seal rings 56
13 Coating and colour coding 56
14 Marking of seal rings 57
15 Quality management systems 57
16 Bolt dimensions and masses 57
Annex A (normative) Pressure temperature ratings and load capacity 58
A1 Flange structural capacity 58
A11 General 58
A12 Capacity 58
A13 Loads 59
A14 Flange utilization ratio 59
A15 Allowable utilization ratios 59
Annex B (normative) Integral flange angle selection 62
B1 General 62
B2 Method 1 Use flange length HW5 and interpolated face angle within thickness range given in Table 15 to Table 20 62
B3 Method 2 Special flange neck geometries 62
B4 Examples 63
B41 Standard flange length with interpolated face angles 63
B42 Special flange neck geometries with interpolated face angle from cross-sectional area estimation (non-standard flange neck geometry) 64
B43 Special flange neck geometries with interpolated face angle from effective inner diameter and cross-sectional area estimation 66
B44 Special flange neck geometries with extrapolated face angle from effective inner diameter in ldquoextended rangerdquo and cross-sectional area estimation 69
Annex C (normative) Bolt dimensions and masses 72
Annex D (normative) Handling installation assembly and repair of flanges 80
D1 General 80
D2 Protection 80
D3 Flange handling 80
D4 Welding 80
D5 Painting 80
D6 Procedure personnel and equipment for assembly 81
ISODIS 275092019(E)
iv copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
D7 Preparation before final preloading 81
D71 Clean and check dimensions and surfaces 81
D72 IX seal ring ndash Installation and check for stand-off 84
D73 Use of lubrication and sealant 84
D74 Lubrication of nuts and bolts 84
D75 Alignment 85
D76 Fitting 85
D8 Final pre-loading procedure 86
D81 Torque tightening 86
D82 Tightening by hydraulic tensioner 87
D9 Maintenance 88
D10 Disassembly 89
D11 Bolt tensioning qualification procedure 90
D111 General 90
D112 Competence management 90
D113 Torque preloading 90
D1131 Background 90
D1132 Equipment 91
D1133 Calibration and qualification 92
D1134 Lubrication procedure 92
D114 Hydraulic tension preloading 92
D1141 Background 92
D1142 Equipment 92
D1143 Qualification and calibration 93
Annex E (informative) Mass of flanges 94
Annex F (informative) Metric bolting 106
Annex G (informative) Additional information on bibliographical references 108
Bibliography 110
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved v
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
oSIST prEN ISO 275092019
copy ISO 2019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ringIndustries du peacutetrole et du gaz naturel mdash Raccordements agrave brides compactes avec bague deacutetancheacuteiteacute IX
ICS 2304060
Reference numberISODIS 275092019(E)
DRAFT INTERNATIONAL STANDARDISODIS 27509
ISOTC 67SC 6 Secretariat AFNOR
Voting begins on Voting terminates on2019-06-14 2019-09-06
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL TECHNOLOGICAL COMMERCIAL AND USER PURPOSES DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT WITH THEIR COMMENTS NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION
This document is circulated as received from the committee secretariat
FAST TRACK PROCEDURE
ISOCEN PARALLEL PROCESSING
oSIST prEN ISO 275092019
ISODIS 275092019(E)
ii copy ISO 2019 ndash All rights reserved
COPYRIGHT PROTECTED DOCUMENT
copy ISO 2019All rights reserved Unless otherwise specified or required in the context of its implementation no part of this publication may be reproduced or utilized otherwise in any form or by any means electronic or mechanical including photocopying or posting on the internet or an intranet without prior written permission Permission can be requested from either ISO at the address below or ISOrsquos member body in the country of the requester
ISO copyright officeCP 401 bull Ch de Blandonnet 8CH-1214 Vernier GenevaPhone +41 22 749 01 11Fax +41 22 749 09 47Email copyrightisoorgWebsite wwwisoorg
Published in Switzerland
oSIST prEN ISO 275092019
Contents
Foreword vi
Introduction viii
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Abbreviations and symbols 3 41 Abbreviated terms 3 42 Symbols 3
5 Design 6 51 General 6 52 Design principles 6 53 Assembly requirements 8 54 Standard components 9 55 Units of measurements 9 56 Rounding 9 57 Compliance with piping design codes 9 58 Compliance to this document 10
6 Designation 10 61 Designation of flanges 10 62 Designation of seal rings 10
7 Materials 11 71 General 11 72 Flange materials 11 73 Bolting materials 11 74 Seal ring materials 12
8 Strength pressuretemperature ratings and leak tightness 13 81 General 13 82 Pressuretemperature ratings 14 83 Pressure testing and leak tightness 14
9 Dimensions of flanges 15 91 General 15 92 Weld neck (WN) dimensions 16 93 Blind flange (BL) dimensions 24 94 Integral flange (IF) dimensions 27 95 Rigid interface (RI) dimensions 39 96 Dimensions of paddle blanks (PB) and paddle spacers (PS) 42 97 Handle and lifting lugs 44 98 Dimensions of orifice spacers (OS) 46 99 Dimensions of reducing threaded flanges (RTs) 47 910 Auxiliary connections 48 911 Flange tolerances 49 912 Surface finish 50
10 Marking of flanges 51 101 Flanges other than integral flanges 51 102 Manufacturers name or trademark 51 103 Nominal size 52 104 Pressure class designation 52
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved iii
oSIST prEN ISO 275092019
105 Pipe dimensions 52 106 Material designation 52 107 Identification of internally threaded flanges 52 108 Material traceability 52 109 Marking examples 52 1010 Stamping 53
11 Dimensions of seal rings 53
12 Manufacture testing and inspection of IX seal rings 56
13 Coating and colour coding 56
14 Marking of seal rings 57
15 Quality management systems 57
16 Bolt dimensions and masses 57
Annex A (normative) Pressure temperature ratings and load capacity 58
A1 Flange structural capacity 58
A11 General 58
A12 Capacity 58
A13 Loads 59
A14 Flange utilization ratio 59
A15 Allowable utilization ratios 59
Annex B (normative) Integral flange angle selection 62
B1 General 62
B2 Method 1 Use flange length HW5 and interpolated face angle within thickness range given in Table 15 to Table 20 62
B3 Method 2 Special flange neck geometries 62
B4 Examples 63
B41 Standard flange length with interpolated face angles 63
B42 Special flange neck geometries with interpolated face angle from cross-sectional area estimation (non-standard flange neck geometry) 64
B43 Special flange neck geometries with interpolated face angle from effective inner diameter and cross-sectional area estimation 66
B44 Special flange neck geometries with extrapolated face angle from effective inner diameter in ldquoextended rangerdquo and cross-sectional area estimation 69
Annex C (normative) Bolt dimensions and masses 72
Annex D (normative) Handling installation assembly and repair of flanges 80
D1 General 80
D2 Protection 80
D3 Flange handling 80
D4 Welding 80
D5 Painting 80
D6 Procedure personnel and equipment for assembly 81
ISODIS 275092019(E)
iv copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
D7 Preparation before final preloading 81
D71 Clean and check dimensions and surfaces 81
D72 IX seal ring ndash Installation and check for stand-off 84
D73 Use of lubrication and sealant 84
D74 Lubrication of nuts and bolts 84
D75 Alignment 85
D76 Fitting 85
D8 Final pre-loading procedure 86
D81 Torque tightening 86
D82 Tightening by hydraulic tensioner 87
D9 Maintenance 88
D10 Disassembly 89
D11 Bolt tensioning qualification procedure 90
D111 General 90
D112 Competence management 90
D113 Torque preloading 90
D1131 Background 90
D1132 Equipment 91
D1133 Calibration and qualification 92
D1134 Lubrication procedure 92
D114 Hydraulic tension preloading 92
D1141 Background 92
D1142 Equipment 92
D1143 Qualification and calibration 93
Annex E (informative) Mass of flanges 94
Annex F (informative) Metric bolting 106
Annex G (informative) Additional information on bibliographical references 108
Bibliography 110
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved v
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
copy ISO 2019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ringIndustries du peacutetrole et du gaz naturel mdash Raccordements agrave brides compactes avec bague deacutetancheacuteiteacute IX
ICS 2304060
Reference numberISODIS 275092019(E)
DRAFT INTERNATIONAL STANDARDISODIS 27509
ISOTC 67SC 6 Secretariat AFNOR
Voting begins on Voting terminates on2019-06-14 2019-09-06
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL TECHNOLOGICAL COMMERCIAL AND USER PURPOSES DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT WITH THEIR COMMENTS NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION
This document is circulated as received from the committee secretariat
FAST TRACK PROCEDURE
ISOCEN PARALLEL PROCESSING
oSIST prEN ISO 275092019
ISODIS 275092019(E)
ii copy ISO 2019 ndash All rights reserved
COPYRIGHT PROTECTED DOCUMENT
copy ISO 2019All rights reserved Unless otherwise specified or required in the context of its implementation no part of this publication may be reproduced or utilized otherwise in any form or by any means electronic or mechanical including photocopying or posting on the internet or an intranet without prior written permission Permission can be requested from either ISO at the address below or ISOrsquos member body in the country of the requester
ISO copyright officeCP 401 bull Ch de Blandonnet 8CH-1214 Vernier GenevaPhone +41 22 749 01 11Fax +41 22 749 09 47Email copyrightisoorgWebsite wwwisoorg
Published in Switzerland
oSIST prEN ISO 275092019
Contents
Foreword vi
Introduction viii
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Abbreviations and symbols 3 41 Abbreviated terms 3 42 Symbols 3
5 Design 6 51 General 6 52 Design principles 6 53 Assembly requirements 8 54 Standard components 9 55 Units of measurements 9 56 Rounding 9 57 Compliance with piping design codes 9 58 Compliance to this document 10
6 Designation 10 61 Designation of flanges 10 62 Designation of seal rings 10
7 Materials 11 71 General 11 72 Flange materials 11 73 Bolting materials 11 74 Seal ring materials 12
8 Strength pressuretemperature ratings and leak tightness 13 81 General 13 82 Pressuretemperature ratings 14 83 Pressure testing and leak tightness 14
9 Dimensions of flanges 15 91 General 15 92 Weld neck (WN) dimensions 16 93 Blind flange (BL) dimensions 24 94 Integral flange (IF) dimensions 27 95 Rigid interface (RI) dimensions 39 96 Dimensions of paddle blanks (PB) and paddle spacers (PS) 42 97 Handle and lifting lugs 44 98 Dimensions of orifice spacers (OS) 46 99 Dimensions of reducing threaded flanges (RTs) 47 910 Auxiliary connections 48 911 Flange tolerances 49 912 Surface finish 50
10 Marking of flanges 51 101 Flanges other than integral flanges 51 102 Manufacturers name or trademark 51 103 Nominal size 52 104 Pressure class designation 52
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved iii
oSIST prEN ISO 275092019
105 Pipe dimensions 52 106 Material designation 52 107 Identification of internally threaded flanges 52 108 Material traceability 52 109 Marking examples 52 1010 Stamping 53
11 Dimensions of seal rings 53
12 Manufacture testing and inspection of IX seal rings 56
13 Coating and colour coding 56
14 Marking of seal rings 57
15 Quality management systems 57
16 Bolt dimensions and masses 57
Annex A (normative) Pressure temperature ratings and load capacity 58
A1 Flange structural capacity 58
A11 General 58
A12 Capacity 58
A13 Loads 59
A14 Flange utilization ratio 59
A15 Allowable utilization ratios 59
Annex B (normative) Integral flange angle selection 62
B1 General 62
B2 Method 1 Use flange length HW5 and interpolated face angle within thickness range given in Table 15 to Table 20 62
B3 Method 2 Special flange neck geometries 62
B4 Examples 63
B41 Standard flange length with interpolated face angles 63
B42 Special flange neck geometries with interpolated face angle from cross-sectional area estimation (non-standard flange neck geometry) 64
B43 Special flange neck geometries with interpolated face angle from effective inner diameter and cross-sectional area estimation 66
B44 Special flange neck geometries with extrapolated face angle from effective inner diameter in ldquoextended rangerdquo and cross-sectional area estimation 69
Annex C (normative) Bolt dimensions and masses 72
Annex D (normative) Handling installation assembly and repair of flanges 80
D1 General 80
D2 Protection 80
D3 Flange handling 80
D4 Welding 80
D5 Painting 80
D6 Procedure personnel and equipment for assembly 81
ISODIS 275092019(E)
iv copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
D7 Preparation before final preloading 81
D71 Clean and check dimensions and surfaces 81
D72 IX seal ring ndash Installation and check for stand-off 84
D73 Use of lubrication and sealant 84
D74 Lubrication of nuts and bolts 84
D75 Alignment 85
D76 Fitting 85
D8 Final pre-loading procedure 86
D81 Torque tightening 86
D82 Tightening by hydraulic tensioner 87
D9 Maintenance 88
D10 Disassembly 89
D11 Bolt tensioning qualification procedure 90
D111 General 90
D112 Competence management 90
D113 Torque preloading 90
D1131 Background 90
D1132 Equipment 91
D1133 Calibration and qualification 92
D1134 Lubrication procedure 92
D114 Hydraulic tension preloading 92
D1141 Background 92
D1142 Equipment 92
D1143 Qualification and calibration 93
Annex E (informative) Mass of flanges 94
Annex F (informative) Metric bolting 106
Annex G (informative) Additional information on bibliographical references 108
Bibliography 110
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved v
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
ISODIS 275092019(E)
ii copy ISO 2019 ndash All rights reserved
COPYRIGHT PROTECTED DOCUMENT
copy ISO 2019All rights reserved Unless otherwise specified or required in the context of its implementation no part of this publication may be reproduced or utilized otherwise in any form or by any means electronic or mechanical including photocopying or posting on the internet or an intranet without prior written permission Permission can be requested from either ISO at the address below or ISOrsquos member body in the country of the requester
ISO copyright officeCP 401 bull Ch de Blandonnet 8CH-1214 Vernier GenevaPhone +41 22 749 01 11Fax +41 22 749 09 47Email copyrightisoorgWebsite wwwisoorg
Published in Switzerland
oSIST prEN ISO 275092019
Contents
Foreword vi
Introduction viii
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Abbreviations and symbols 3 41 Abbreviated terms 3 42 Symbols 3
5 Design 6 51 General 6 52 Design principles 6 53 Assembly requirements 8 54 Standard components 9 55 Units of measurements 9 56 Rounding 9 57 Compliance with piping design codes 9 58 Compliance to this document 10
6 Designation 10 61 Designation of flanges 10 62 Designation of seal rings 10
7 Materials 11 71 General 11 72 Flange materials 11 73 Bolting materials 11 74 Seal ring materials 12
8 Strength pressuretemperature ratings and leak tightness 13 81 General 13 82 Pressuretemperature ratings 14 83 Pressure testing and leak tightness 14
9 Dimensions of flanges 15 91 General 15 92 Weld neck (WN) dimensions 16 93 Blind flange (BL) dimensions 24 94 Integral flange (IF) dimensions 27 95 Rigid interface (RI) dimensions 39 96 Dimensions of paddle blanks (PB) and paddle spacers (PS) 42 97 Handle and lifting lugs 44 98 Dimensions of orifice spacers (OS) 46 99 Dimensions of reducing threaded flanges (RTs) 47 910 Auxiliary connections 48 911 Flange tolerances 49 912 Surface finish 50
10 Marking of flanges 51 101 Flanges other than integral flanges 51 102 Manufacturers name or trademark 51 103 Nominal size 52 104 Pressure class designation 52
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved iii
oSIST prEN ISO 275092019
105 Pipe dimensions 52 106 Material designation 52 107 Identification of internally threaded flanges 52 108 Material traceability 52 109 Marking examples 52 1010 Stamping 53
11 Dimensions of seal rings 53
12 Manufacture testing and inspection of IX seal rings 56
13 Coating and colour coding 56
14 Marking of seal rings 57
15 Quality management systems 57
16 Bolt dimensions and masses 57
Annex A (normative) Pressure temperature ratings and load capacity 58
A1 Flange structural capacity 58
A11 General 58
A12 Capacity 58
A13 Loads 59
A14 Flange utilization ratio 59
A15 Allowable utilization ratios 59
Annex B (normative) Integral flange angle selection 62
B1 General 62
B2 Method 1 Use flange length HW5 and interpolated face angle within thickness range given in Table 15 to Table 20 62
B3 Method 2 Special flange neck geometries 62
B4 Examples 63
B41 Standard flange length with interpolated face angles 63
B42 Special flange neck geometries with interpolated face angle from cross-sectional area estimation (non-standard flange neck geometry) 64
B43 Special flange neck geometries with interpolated face angle from effective inner diameter and cross-sectional area estimation 66
B44 Special flange neck geometries with extrapolated face angle from effective inner diameter in ldquoextended rangerdquo and cross-sectional area estimation 69
Annex C (normative) Bolt dimensions and masses 72
Annex D (normative) Handling installation assembly and repair of flanges 80
D1 General 80
D2 Protection 80
D3 Flange handling 80
D4 Welding 80
D5 Painting 80
D6 Procedure personnel and equipment for assembly 81
ISODIS 275092019(E)
iv copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
D7 Preparation before final preloading 81
D71 Clean and check dimensions and surfaces 81
D72 IX seal ring ndash Installation and check for stand-off 84
D73 Use of lubrication and sealant 84
D74 Lubrication of nuts and bolts 84
D75 Alignment 85
D76 Fitting 85
D8 Final pre-loading procedure 86
D81 Torque tightening 86
D82 Tightening by hydraulic tensioner 87
D9 Maintenance 88
D10 Disassembly 89
D11 Bolt tensioning qualification procedure 90
D111 General 90
D112 Competence management 90
D113 Torque preloading 90
D1131 Background 90
D1132 Equipment 91
D1133 Calibration and qualification 92
D1134 Lubrication procedure 92
D114 Hydraulic tension preloading 92
D1141 Background 92
D1142 Equipment 92
D1143 Qualification and calibration 93
Annex E (informative) Mass of flanges 94
Annex F (informative) Metric bolting 106
Annex G (informative) Additional information on bibliographical references 108
Bibliography 110
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved v
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
Contents
Foreword vi
Introduction viii
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Abbreviations and symbols 3 41 Abbreviated terms 3 42 Symbols 3
5 Design 6 51 General 6 52 Design principles 6 53 Assembly requirements 8 54 Standard components 9 55 Units of measurements 9 56 Rounding 9 57 Compliance with piping design codes 9 58 Compliance to this document 10
6 Designation 10 61 Designation of flanges 10 62 Designation of seal rings 10
7 Materials 11 71 General 11 72 Flange materials 11 73 Bolting materials 11 74 Seal ring materials 12
8 Strength pressuretemperature ratings and leak tightness 13 81 General 13 82 Pressuretemperature ratings 14 83 Pressure testing and leak tightness 14
9 Dimensions of flanges 15 91 General 15 92 Weld neck (WN) dimensions 16 93 Blind flange (BL) dimensions 24 94 Integral flange (IF) dimensions 27 95 Rigid interface (RI) dimensions 39 96 Dimensions of paddle blanks (PB) and paddle spacers (PS) 42 97 Handle and lifting lugs 44 98 Dimensions of orifice spacers (OS) 46 99 Dimensions of reducing threaded flanges (RTs) 47 910 Auxiliary connections 48 911 Flange tolerances 49 912 Surface finish 50
10 Marking of flanges 51 101 Flanges other than integral flanges 51 102 Manufacturers name or trademark 51 103 Nominal size 52 104 Pressure class designation 52
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved iii
oSIST prEN ISO 275092019
105 Pipe dimensions 52 106 Material designation 52 107 Identification of internally threaded flanges 52 108 Material traceability 52 109 Marking examples 52 1010 Stamping 53
11 Dimensions of seal rings 53
12 Manufacture testing and inspection of IX seal rings 56
13 Coating and colour coding 56
14 Marking of seal rings 57
15 Quality management systems 57
16 Bolt dimensions and masses 57
Annex A (normative) Pressure temperature ratings and load capacity 58
A1 Flange structural capacity 58
A11 General 58
A12 Capacity 58
A13 Loads 59
A14 Flange utilization ratio 59
A15 Allowable utilization ratios 59
Annex B (normative) Integral flange angle selection 62
B1 General 62
B2 Method 1 Use flange length HW5 and interpolated face angle within thickness range given in Table 15 to Table 20 62
B3 Method 2 Special flange neck geometries 62
B4 Examples 63
B41 Standard flange length with interpolated face angles 63
B42 Special flange neck geometries with interpolated face angle from cross-sectional area estimation (non-standard flange neck geometry) 64
B43 Special flange neck geometries with interpolated face angle from effective inner diameter and cross-sectional area estimation 66
B44 Special flange neck geometries with extrapolated face angle from effective inner diameter in ldquoextended rangerdquo and cross-sectional area estimation 69
Annex C (normative) Bolt dimensions and masses 72
Annex D (normative) Handling installation assembly and repair of flanges 80
D1 General 80
D2 Protection 80
D3 Flange handling 80
D4 Welding 80
D5 Painting 80
D6 Procedure personnel and equipment for assembly 81
ISODIS 275092019(E)
iv copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
D7 Preparation before final preloading 81
D71 Clean and check dimensions and surfaces 81
D72 IX seal ring ndash Installation and check for stand-off 84
D73 Use of lubrication and sealant 84
D74 Lubrication of nuts and bolts 84
D75 Alignment 85
D76 Fitting 85
D8 Final pre-loading procedure 86
D81 Torque tightening 86
D82 Tightening by hydraulic tensioner 87
D9 Maintenance 88
D10 Disassembly 89
D11 Bolt tensioning qualification procedure 90
D111 General 90
D112 Competence management 90
D113 Torque preloading 90
D1131 Background 90
D1132 Equipment 91
D1133 Calibration and qualification 92
D1134 Lubrication procedure 92
D114 Hydraulic tension preloading 92
D1141 Background 92
D1142 Equipment 92
D1143 Qualification and calibration 93
Annex E (informative) Mass of flanges 94
Annex F (informative) Metric bolting 106
Annex G (informative) Additional information on bibliographical references 108
Bibliography 110
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved v
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
105 Pipe dimensions 52 106 Material designation 52 107 Identification of internally threaded flanges 52 108 Material traceability 52 109 Marking examples 52 1010 Stamping 53
11 Dimensions of seal rings 53
12 Manufacture testing and inspection of IX seal rings 56
13 Coating and colour coding 56
14 Marking of seal rings 57
15 Quality management systems 57
16 Bolt dimensions and masses 57
Annex A (normative) Pressure temperature ratings and load capacity 58
A1 Flange structural capacity 58
A11 General 58
A12 Capacity 58
A13 Loads 59
A14 Flange utilization ratio 59
A15 Allowable utilization ratios 59
Annex B (normative) Integral flange angle selection 62
B1 General 62
B2 Method 1 Use flange length HW5 and interpolated face angle within thickness range given in Table 15 to Table 20 62
B3 Method 2 Special flange neck geometries 62
B4 Examples 63
B41 Standard flange length with interpolated face angles 63
B42 Special flange neck geometries with interpolated face angle from cross-sectional area estimation (non-standard flange neck geometry) 64
B43 Special flange neck geometries with interpolated face angle from effective inner diameter and cross-sectional area estimation 66
B44 Special flange neck geometries with extrapolated face angle from effective inner diameter in ldquoextended rangerdquo and cross-sectional area estimation 69
Annex C (normative) Bolt dimensions and masses 72
Annex D (normative) Handling installation assembly and repair of flanges 80
D1 General 80
D2 Protection 80
D3 Flange handling 80
D4 Welding 80
D5 Painting 80
D6 Procedure personnel and equipment for assembly 81
ISODIS 275092019(E)
iv copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
D7 Preparation before final preloading 81
D71 Clean and check dimensions and surfaces 81
D72 IX seal ring ndash Installation and check for stand-off 84
D73 Use of lubrication and sealant 84
D74 Lubrication of nuts and bolts 84
D75 Alignment 85
D76 Fitting 85
D8 Final pre-loading procedure 86
D81 Torque tightening 86
D82 Tightening by hydraulic tensioner 87
D9 Maintenance 88
D10 Disassembly 89
D11 Bolt tensioning qualification procedure 90
D111 General 90
D112 Competence management 90
D113 Torque preloading 90
D1131 Background 90
D1132 Equipment 91
D1133 Calibration and qualification 92
D1134 Lubrication procedure 92
D114 Hydraulic tension preloading 92
D1141 Background 92
D1142 Equipment 92
D1143 Qualification and calibration 93
Annex E (informative) Mass of flanges 94
Annex F (informative) Metric bolting 106
Annex G (informative) Additional information on bibliographical references 108
Bibliography 110
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved v
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
D7 Preparation before final preloading 81
D71 Clean and check dimensions and surfaces 81
D72 IX seal ring ndash Installation and check for stand-off 84
D73 Use of lubrication and sealant 84
D74 Lubrication of nuts and bolts 84
D75 Alignment 85
D76 Fitting 85
D8 Final pre-loading procedure 86
D81 Torque tightening 86
D82 Tightening by hydraulic tensioner 87
D9 Maintenance 88
D10 Disassembly 89
D11 Bolt tensioning qualification procedure 90
D111 General 90
D112 Competence management 90
D113 Torque preloading 90
D1131 Background 90
D1132 Equipment 91
D1133 Calibration and qualification 92
D1134 Lubrication procedure 92
D114 Hydraulic tension preloading 92
D1141 Background 92
D1142 Equipment 92
D1143 Qualification and calibration 93
Annex E (informative) Mass of flanges 94
Annex F (informative) Metric bolting 106
Annex G (informative) Additional information on bibliographical references 108
Bibliography 110
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved v
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations governmental and non-governmental in liaison with ISO also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization
The procedures used to develop this document and those intended for its further maintenance are described in the ISOIEC Directives Part 1 In particular the different approval criteria needed for the different types of ISO documents should be noted This document was drafted in accordance with the editorial rules of the ISOIEC Directives Part 2 (see wwwisoorgdirectives)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights Details of any patent rights identified during the development of the document will be in the Introduction andor on the ISO list of patent declarations received (see wwwisoorgpatents)
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement
For an explanation of the voluntary nature of standards the meaning of ISO specific terms and expressions related to conformity assessment as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see wwwisoorgisoforewordhtml
This document was prepared by Technical Committee ISOTC 67 Materials equipment and offshore structures for petroleum petrochemical and natural gas industries Subcommittee SC 6 Processing equipment and systems
This second edition cancels and replaces the first edition (ISO 275092012) which has been technically revised
The main changes from the previous edition have been made to reduce risk of mistakes and quality issues which have been the major cause to a limited use of the first edition of this document The main changes are as follows
Annexes B and D (Annex E in previous edition) have become normative annexes because they contain requirements
More stringent quality requirements regarding manufacture of products and assembly instructions have been introduced These include
ultrasonic testing of products according to new requirements in ASME VIII div 2 (in Clause 7)
the importance of stringent requirements to material strength and machining strictly according to given tolerances for IX seal rings (in Clause 12)
new and better coating requirements for IX seal rings (in Clause 13 and Annex D)
requirements about quality assurance and control and conformance of products according to EN 1020431 (in Clause 15)
ISODIS 275092019(E)
vi copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
excluding use of IX seal rings to assist alignment by transfer of significant shear load during assembly (in Annex D)
more comprehensive and detailed guidelines on the evaluation of damages to products and the repair of such damages (in Annex D)
more comprehensive requirements to qualification of bolt tensioning procedures (in Annex D)
The elastoplastic deformation of flanges by first assembly has been better explained in 53 and in Annex D in order to prevent unnecessary re-machining or rejection when flange bevel angles have changed
Any feedback or questions on this document should be directed to the userrsquos national standards body A complete listing of these bodies can be found at wwwisoorgmembershtml
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved vii
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
Introduction
This document which is originally based on NORSOK L-005 has been developed to provide a standard for compact flanged connections (CFCs) that constitutes an alternative to conventional flanges as specified in ASME standards European Standards and other International Standards with reduced mass and smaller overall dimensions as well as increased reliability in leak tightness by means of its inherent design features and make up procedures CFCs can also provide an alternative to other types of clamp and hub type mechanical connectors
The use of load carrying sealing elements traditionally referred to as gaskets does not comply with the fundamental requirements of this document
This document has been developed for use in process piping systems which are designed according to codes for pressure piping eg ASME B313 See 57 for more details
The flange designs have been selected to achieve a minimum safety factor of 20 when subjected to a design pressure equal to ASME B165 pressure temperature ratings within the temperature limits of this document
The main body of this document contains all necessary information on how to manufacture and supply flange and seal ring materials such as
flange dimensions and material requirements
seal ring dimensions and material requirements
bolting dimensions and material requirements
requirements to tolerances and surface finish
requirements to designation and marking of finished products
The normative annexes A B C and D cover the following topics
structural capacity equations for flange assemblies
how to apply the flanges to special geometries of valves and equipment nozzles
bolt dimensions and masses
installation and assembly instructions and guidelines on how to repair damage and irregularities on sealing surfaces
The informative annexes E F and G cover the following topics
masses of all standard components
suitable dimensions of alternative metric bolting
additional information on bibliographical references
ISODIS 275092019(E)
viii copy ISO 2019 ndash All rights reserved
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
For the purposes of this document the following verbal forms apply
shall indicates a requirement strictly to be followed in order to conform to this document and from which no deviation is permitted unless accepted by all involved parties
should indicates that among several possibilities one is recommended as particularly suitable without mentioning or excluding others or that a certain course of action is preferred but not necessarily required
may indicates a course of action permissible within the limits of this document
can is used for statements of possibility and capability whether material physical or casual
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved ix
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
ISODIS 275092019(E)
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019
Petroleum and natural gas industries mdash Compact flanged connections with IX seal ring
1 Scope
This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS frac12) to DN 1200 (NPS 48) and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS frac12) to DN 600 (NPS 24)
NOTE NPS is in accordance with ASME B3610M and ASME B3619M
This document is applicable to welding neck flanges blind flanges paddle spacers and spacer blinds (paddle blanks) valveequipment integral flanges orifice spacers reducing threaded flanges and rigid interfaces for use in process piping for the petroleum petrochemical and natural gas industries
This document is applicable within a temperature range from minus196 degC to +250 degC
This document is not applicable for external pressure
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document For dated references only the edition cited applies For undated references the latest edition of the referenced document (including any amendments) applies
ISO 2768-1 General tolerances mdash Part 1 Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287 Geometrical product specification (GPS) mdash Surface texture Profile method mdash Terms definitions and surface texture parameters
ISO 4288 Geometric Product Specifications (GPS) mdash Surface texture Profile method mdash Rules and procedures for the assessment of surface texture
ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 1 General principles and requirements
ISO 5167-22003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full mdash Part 2 Orifice plates
ISO 14313 Petroleum and natural gas industries mdash Pipeline transportation systems mdash Pipeline valves
ISO 80000-12009 Quantities and units mdash Part 1 General
EN 1092-1 Flanges and their joints mdash Circular flanges for pipes valves fittings and accessories PN designated mdash Part 1 Steel flanges
EN 1591-4 Flanges and their joints mdash Part 4 Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779 Non-destructive testing mdash Leak testing mdash Criteria for method and technique selection
ISODIS 275092019(E)
copy ISO 2019 ndash All rights reserved 1
oSIST prEN ISO 275092019